Identification of the major contributors to the high pH of fly ash followed by chemically induced pH reduction

路易斯安那州-太平洋加拿大有限公司是一家工程木材工厂，雇用约300名全职员工，并利用 它产生的木材残渣，以及一些林产品公司在 公元前东南部为其位于戈尔登的工程木制品工厂发电和处理蒸汽， 这种电力和工艺蒸汽是通过燃烧木屑、树皮和木纤维在 生物质发电厂和这种燃烧的结果；大约4400吨灰渣是 每年都在这个工厂生产。经过20年的运营，已有约88000吨灰渣 产生并储存在现场垃圾填埋池中。目前，一旦现场垃圾填埋池达到容量，该设施就有 选择打开另一个垃圾填埋池或将火山灰残留物运往永久垃圾填埋场。然而， 路易斯安那州太平洋加拿大有限公司希望减少其对环境的影响，并重新利用火山灰残留物 作为农用地的一种营养丰富的肥料。在灰渣可以作为肥料使用之前， 灰烬的PH值需要化学降低，钠含量需要优化用于农业 使用。不幸的是，通过化学方法降低生物质发电厂灰渣的pH值 作为一种肥料在农田上的应用是前所未有的。要做到这一点， 路易斯安那州-太平洋加拿大有限公司与KRL Solutions Ltd.达成合作伙伴关系，以期 研究将火山灰残渣用作肥料的可行性，并与汤普森·里弗斯大学的科学家一起 提供实验设计和化学还原方面的科学专业知识。共同努力，这一伙伴关系将 确定一种安全和环保的方法来降低灰渣的酸碱度，并评估 我国目前约88000吨灰渣大规模化学减量再利用的可行性 不列颠哥伦比亚省戈尔登工程木制品工厂的现场垃圾填埋场。这项初步研究的成功 该项目将提供必要的知识，以减少最终进入 每年来自加拿大各地类似设施的垃圾填埋场。

Louisiana-Pacific Canada Ltd. is an engineered wood facility that employs ~300 fulltime staff and makes use of wood residuals that it generates, as well as waste produced by a number of forest product companies in southeastern B.C. to generate electricity and process steam for its engineered wood product facility in Golden, B.C. This electricity and process steam is generated by burning wood chips, bark and wood fiber in a biomass-fired power plant and as a result of this burning; approximately 4400 tonnes of ash residuals are produced at this facility every year. After 20 years in operation ~88000 tonnes of ash residuals have been generated and stored in onsite landfill cells. Presently, once onsite landfill cells reach capacity the facility has the option to open another landfill cell or transport the ash residuals to a permanent landfill. However Louisiana-Pacific Canada Ltd. would like to reduce its impact on the environment and reuse the ash residuals as a nutrient rich fertilizer for agricultural lands. Before the ash residuals can be applied as a fertilizer the high pH of the ash needs to be chemically reduced and the sodium content needs to be optimized for agricultural use. Unfortunately, chemically reducing the pH of ash residuals from a biomass-fired power plant for application on agricultural fields as a fertilizer has never been done before. To accomplish this, Louisiana-Pacific Canada Ltd. has entered into a collaborative partnership with KRL Solutions Ltd., to look into the feasibility of using ash residuals as a fertilizer and with scientists at Thompson Rivers University to provide scientific expertise in experimental design and chemical reduction. Together, this partnership will identify a safe and environmentally friendly method of reducing the pH of the ash residuals and assess the feasibility of the large scale chemical reduction and reuse of the ~88000 tonnes of ash residuals currently in onsite landfills at the engineered wood product facility in Golden, B.C. The success of this initial research project will provide the knowledge necessary to reduce the ~4 million tonnes of ash residuals that end up in landfills each year from similar facilities across Canada.